数学证明的优雅常常反映了它所描述的算法的效率。
Trust me: There is no “them”.
The detection of gravitational waves has opened a new window to observe the universe.
The past is the past, and that’s where it belongs.
当科学开始研究非物质现象的那一天,它将在十年内取得比过去所有世纪更多的进步。